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GCN Circulars

GCN Circulars are rapid bulletins submitted by and distributed to the community. See the documentation for help with subscribing to or submitting Circulars.

Search for Circulars by submitter, subject, or body text (e.g. 'Fermi GRB').
To navigate to a specific circular, enter the associated Circular ID (e.g. 'gcn123', 'Circular 123', or '123').
Advanced Search

To narrow the search results, use advanced search syntax. This allows for specifying which circular field to search (submitter, subject, and/or body). For additional information, refer to the advanced search documentation.

Advanced Search Examples (click to copy):

subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

28231 results found.

  1. GRB050717: Swift XRT position
  2. Swift detection of GRB 050717
  3. Swift UVOT Observations of GRB 050716
  4. GRB 050716: Refined XRT analysis.
  5. GRB050716: Refined analysis of the Swift-BAT burst
  6. GRB 050716: Lulin B and R band optical observations
  7. GRB050716, optical observation
  8. GRB050716: Faulkes North Telescope observation
  9. GRB050715: Refined analysis of the Swift-BAT burst
  10. GRB 050715: Swift-BAT detection
  11. GRB 050713b: RTT150 optical observations
  12. GRB050714B: Refined analysis of the Swift-BAT burst
  13. GRB 050714B: optical afterglow
  14. GRB 050714, R-band candidate
  15. GRB 050714, optical observations
  16. GRB 050713A: XRT refined analysis
  17. GRB 050713A: RAPTOR detection of early optical emission
  18. GRB050713B :Swift/UVOT observations
  19. GRB050713b: XRT refined analysis
  20. GRB050712: TNG R-band observations
  21. GRB 050713B: Swift-BAT Refined Analysis
  22. GRB 050713A: Swift/UVOT observation
  23. GRB 050713A : Swift-BAT Refined Analysis
  24. GRB050712: Swift UVOT Observation of Afterglow Emission
  25. GRB 050713A : Lulin R-band observation
  26. GRB 050713A XMM-Newton observation
  27. GRB 050713b : Lulin R-band observations
  28. GRB050713B: Faulkes North Telescope observation
  29. RBO RI observations of GRB 050713A
  30. GRB 050713B
  31. GRB050709 : Chandra source optical counterpart
  32. GRB050713: Liverpool Telescope prompt observations
  33. GRB 050712, optical observations
  34. GRB050709: Candidate X-ray Afterglow from Chandra
  35. GRB050713: possible I-band afterglow
  36. GRB050712: XRT refined analysis
  37. GRB050709: Radio Observations
  38. GRB 050709: Swift UVOT and XRT observations
  39. GRB 050712: Swift-BAT Refined Analysis
  40. GRB050712: UVOT candidate optical counterpart
  41. GRB 050709: LCO40 Observations
  42. GRB050709, optical observations
  43. PROMPT Rc Observations of GRB 050709
  44. GRB 050525a: PROMPT VRcIc Detections
  45. GRB 050525a: ARC 3.5-meter Optical and NIR Observations
  46. GRB 050525a: ARC 3.5-Meter SPIcam Field Calibration
  47. GRB 050626: Swift XRT observations
  48. GRB 050408: ARC 3.5-meter NIR Observations
  49. GRB 050701: Refined XRT analysis
  50. Swift UVOT observations of GRB 050701
  51. GRB050701: Swift-BAT Refined analysis
  52. Swift trigger 143708 is really GRB 050701
  53. GRB 050607, radio observations
  54. H11603: An X-ray flare from V4641 Sgr, or a possible XRF
  55. GRB050525a: HST Observations
  56. H3800 and H3801 on 2005 June 11: two bursts from SGR1806-20 localized by HETE
  57. XRF 050509c: Optical monitoring
  58. Konus-Wind observation of an intermediate burst from SGR 1806-20
  59. XRF050509c: Radio Detection
  60. GRB 050607 optical decay
  61. GRB050607: refined analysis of prompt REM observations
  62. GRB 050607: PROMPT VRcIc Observations
  63. GRB 050607: Optical decay and spectral slope
  64. GRB050607,optical observation
  65. Optical Afterglow of GRB 050607
  66. GRB050607: Swift Detection of a long GRB
  67. GRB050607: prompt REM observations
  68. Limits on a SN in the field of GRB 050509b
  69. GRB 050603 - XRT data analysis of the first day
  70. GRB050603, submillimetre observations
  71. GRB050603: Radio Detection
  72. GRB 050603: Swift-BAT refined analysis of a long three-spiked burst
  73. GRB 050603: INTEGRAL shows it is not a short GRB
  74. GRB 050525a, infrared observations
  75. GRB050528, XRT observations
  76. GRB050528: updated Liverpool Telescope limits
  77. Swift-BAT GRB 050528: a soft burst
  78. GRB050504: Ashra-P2/3 monitor and Ashra-AFT response
  79. Possible GRB050528: no candidate from Liverpool Telescope
  80. GRB050525a: Radio Observations
  81. GRB 050509b: refined XRT/Chandra afterglow position analysis
  82. GRB 050525: RTT150, Optical observations
  83. GRB 050525a: SARA Observations
  84. GRB 050525B: Swift-BAT observations
  85. GRB 050525: MITSuME Optical Observation in VRI
  86. GRB050525A,optical observation
  87. GRB050525: Super-LOTIS observations
  88. GRB 050525, spectral lag pseudo-redshift
  89. GRB050306: optical afterglow not confirmed
  90. GRB 050525: BART optical observation
  91. GRB 050525A: BOOTES simultaneous optical observations
  92. GRB 050525A: Swift-BAT refined analysis
  93. GRB050525: Optical observations
  94. GRB 050525B: INTEGRAL shows it is unrelated to GRB050525A
  95. Konus-Wind observation of GRB 050525
  96. GRB 050525: TAROT observations of the early afterglow
  97. INTEGRAL detection of GRB 050525
  98. GRB 050525, infrared observations
  99. GRB 050525: observatons of the optical afterglow
  100. GRB050525: ROTSE-III Refined Analysis

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